Photocopying – Projection printing and copying cameras – Step and repeat
Reexamination Certificate
2006-02-07
2008-11-04
Rutledge, Della J. (Department: 2851)
Photocopying
Projection printing and copying cameras
Step and repeat
C355S072000, C355S077000
Reexamination Certificate
active
07446854
ABSTRACT:
A lithographic apparatus includes a first control system to control a first physical quantity in the lithographic apparatus. A parameter in the first control system is dependent on a value of a further physical quantity in the lithographic apparatus. The parameter may be included in a feedforward path. An input of the feedforward path may be connected to a second control system, the second control system to control a second physical quantity in the lithographic apparatus. The feedforward path may provide a feedforward signal to the first control system in dependency on a signal in the second control system. The further physical quantity may include the second physical quantity.
REFERENCES:
patent: 5663783 (1997-09-01), Ueda
patent: 2005/0140326 (2005-06-01), Houkes et al.
patent: 2006/0238739 (2006-10-01), Butler
ASML Netherlands B.V.
Rutledge Della J.
Sterne, Kessler, Goldstein & Fox P.L.L.C
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